US20140204453A1 - Electrophoretic display apparatus - Google Patents
Electrophoretic display apparatus Download PDFInfo
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- US20140204453A1 US20140204453A1 US14/060,579 US201314060579A US2014204453A1 US 20140204453 A1 US20140204453 A1 US 20140204453A1 US 201314060579 A US201314060579 A US 201314060579A US 2014204453 A1 US2014204453 A1 US 2014204453A1
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- color filter
- electrophoretic display
- display apparatus
- electrophoretic
- charged particles
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1677—Structural association of cells with optical devices, e.g. reflectors or illuminating devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1679—Gaskets; Spacers; Sealing of cells; Filling or closing of cells
- G02F1/1681—Gaskets; Spacers; Sealing of cells; Filling or closing of cells having two or more microcells partitioned by walls, e.g. of microcup type
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/52—RGB geometrical arrangements
Definitions
- the invention generally relates to a display apparatus, and more particularly, to an electrophoretic display apparatus.
- the electronic paper (e-paper) and the e-book use electrophoretic display technique to achieve the purpose of displaying.
- the display medium thereof is constituted mainly by black electrophoretic liquid and white charged particles doped in the black electrophoretic liquid, where the white charged particles can migrate by applying a voltage so that each pixel can respectively display black color, white color or grayscale.
- the electrophoretic displays achieve the purpose of displaying by using the reflection of an external light source, where each pixel can respectively display the required grayscale through driving the white charged particles in the electrophoretic liquid by applying a voltage.
- a color filter film is employed and disposed on the electrophoretic display film.
- the presented color of the electrophoretic display apparatus is achieved mainly by using the ambient light, which penetrates the color filter film, and then, after reflecting the ambient light by the white charged particles in the electrophoretic liquid, the reflected light penetrates the color filter film again for displaying.
- the color filter layer mainly consists of a plurality of filter patterns with different colors, and each of the filter patterns with different colors is respectively corresponding to a pixel unit on the drive array substrate.
- AOVs angle of viewings
- a black matrix is disposed to partition each filter pattern from the others so as to reduce the color bias problem.
- the above-mentioned measure will cause a relatively smaller light transmittance rate by the black matrix.
- the invention is directed to an electrophoretic display apparatus able to improve the display quality varied with changing angle of viewing (AOV).
- An electrophoretic display apparatus of the invention includes a drive array substrate, a color filter layer and an electrophoretic display film.
- the drive array substrate has a plurality of pixel units, in which each of the pixel units includes a drive device.
- the color filter layer is disposed on the drive array substrate and has a plurality of color filter patterns, in which each of the color filter patterns is corresponding to at least two of the pixel units.
- the electrophoretic display film is disposed between the drive array substrate and the color filter layer and includes a plurality of display mediums, in which the display mediums corresponding to each of the color filter patterns are controlled by at least two of the drive devices.
- the electrophoretic display film further includes a flexible substrate and a common electrode.
- the flexible substrate is disposed between the color filter layer and the display mediums
- the common electrode is disposed on the flexible substrate and located between the flexible substrate and the display mediums.
- each of the display mediums includes an electrophoretic liquid, a plurality of black charged particles and a plurality of white charged particles, and the black charged particles and the white charged particles are distributed in the electrophoretic liquid.
- each of the display mediums includes an electrophoretic liquid, a plurality of black charged particles, a plurality of white charged particles and a micro-cups structure, and the micro-cups structure is filled with the electrophoretic liquid, the black charged particles and the white charged particles therein.
- the color filter patterns include at least one red filter pattern, at least one blue filter pattern and at least one green filter pattern.
- the color filter patterns include at least one red filter pattern, at least one blue filter pattern, at least one green filter pattern and at least one white filter pattern.
- the area of each of the color filter patterns is between 50 micrometers and 10000 micrometers.
- the drive devices of the pixel units corresponding to each of the color filter patterns are arranged in array.
- the drive device includes a thin film transistor (TFT).
- TFT thin film transistor
- the TFT includes top-gate TFT or bottom gate TFT.
- each of the color filter patterns of the invention is corresponding to at least two pixel units and the display mediums corresponding to each of the color filter patterns are controlled by at least two drive devices, so that by turning on and turning off the drive devices, the color of a single color filter pattern presents with grayscale.
- the invention can reduce the color bias problem at boundaries between two adjacent color filter patterns due to different angles of viewing (AOVs).
- the design of the electrophoretic display apparatus in the invention can improve the display quality varied with changing the AOV.
- FIG. 1A is a partial top-view diagram of an electrophoretic display apparatus according to an embodiment of the invention.
- FIG. 1B is a partial cross-sectional diagram of the electrophoretic display apparatus of FIG. 1A .
- FIGS. 1C and 1D are partial top-view diagrams respectively showing the color filter layer of the electrophoretic display apparatus in FIG. 1A according to two embodiments of the invention.
- FIG. 2 is a partial top-view diagram of a plurality of pixel units corresponding to a single color filter pattern according to an embodiment of the invention.
- FIG. 3 is a partial cross-sectional diagram of an electrophoretic display apparatus according to another embodiment of the invention.
- FIG. 1A is a partial top-view diagram of an electrophoretic display apparatus according to an embodiment of the invention and FIG. 1B is a partial cross-sectional diagram of the electrophoretic display apparatus of FIG. 1A .
- an electrophoretic display apparatus 100 a includes a drive array substrate 110 , a color filter layer 120 and an electrophoretic display film 130 a.
- the drive array substrate 110 has a plurality of pixel units 112 , in which each of the pixel units 112 includes a drive device 114 .
- the color filter layer 120 is disposed on the drive array substrate 110 and has a plurality of color filter patterns 122 .
- Each of the color filter patterns 122 is corresponding to at least two pixel units 112 .
- the electrophoretic display film 130 a is disposed between the drive array substrate 110 and the color filter layer 120 and includes a plurality of display mediums 132 , in which the display mediums 132 corresponding to each of the color filter patterns 122 are controlled by at least two of the drive devices 114 .
- the drive array substrate 110 is, for example, a TFT array substrate and the drive device 114 is a TFT and the TFT is, as shown by FIG. 1B , a bottom-gate TFT.
- the drive device 114 can be a top-gate TFT as well, which the invention is not limited to.
- the electrophoretic display film 130 a in the embodiment further includes a flexible substrate 134 and a common electrode 136 , in which the flexible substrate 134 is disposed between the color filter layer 120 and the display mediums 132 , while the common electrode 136 is disposed on the flexible substrate 134 and located between the flexible substrate 134 and the display mediums 132 .
- the material of the flexible substrate 134 is, for example, poly-ethylene tetrephthalate (PET).
- PET poly-ethylene tetrephthalate
- Each of the display mediums 132 herein includes an electrophoretic liquid 132 a, a plurality of black charged particles 132 b and a plurality of white charged particles 132 c as shown by FIG. 1B .
- the black charged particles 132 b and the white charged particles 132 c are distributed in the electrophoretic liquid 132 a.
- each of the color filter patterns 122 of the embodiment is composed of at least one red filter pattern 122 a (two ones are shown in FIG. 1C ), at least one blue filter pattern 122 b (one is shown in FIG. 1C ) and at least one green filter pattern 122 c (one is shown in FIG. 1C ).
- the color filter patterns 122 ′ can be composed of at least one red filter pattern 122 a ′ (one is shown in FIG. 1D ), at least one blue filter pattern 122 b ′ (one is shown in FIG. 1D ), at least one green filter pattern 122 c ′ (one is shown in FIG.
- each of the color filter patterns 122 herein is between 50 micrometers and 10000 micrometers and the drive devices 114 of the pixel units 112 corresponding to each of the color filter patterns 122 are arranged in an array.
- the invention can overcome the color bias problem due to different AOVs at the boundaries between two adjacent color filter patterns 122 .
- FIG. 1A for example, when all the drive devices 114 within the central areas C corresponding to a single color filter pattern 122 are in turning on state and all the drive devices 114 within the peripheral areas P corresponding to a single color filter pattern 122 are in turning-off state, at the time, the color of the single color filter pattern 122 presents with grayscale coming with a bright central portion and dark surrounding portions. In this way, the invention can overcome the color bias problem due to different AOVs at the boundaries between two adjacent color filter patterns 122 . In other embodiments, referring to FIG.
- any people of the art can refer to the description of the above-mentioned embodiment and according to the real requirement make all the drive devices 114 corresponding to a single color filter pattern 122 in turning on state or in turning off state by design so as to achieve the required effect.
- every color filter pattern 122 in the embodiment is corresponding to at least two pixel units 112 and the display mediums 132 corresponding to each the color filter pattern 122 are controlled by at least two drive devices 114 , the color of a single color filter pattern 122 can present with grayscale by turning on/off the drive devices 114 .
- the invention can reduce the color bias problem at boundaries between two adjacent color filter patterns due to different AOVs.
- the design of the electrophoretic display apparatus 100 a in the embodiment can improve the display quality varied with changing angle of viewing (AOV).
- each of the above-mentioned display mediums 132 is composed of an electrophoretic liquid 132 a , black charged particles 132 b and white charged particles 132 c, but in other embodiments, referring to FIG.
- each display medium 132 ′ of the electrophoretic display film 130 b in an electrophoretic display apparatus 100 b can include an electrophoretic liquid 132 a ′, a plurality of black charged particles 132 b ′, a plurality of white charged particles 132 c ′ and a micro-cups structure 132 d ′, in which the micro-cups structure 132 d ′ is filled with the electrophoretic liquid 132 a ′, the black charged particles 132 b ′ and the white charged particles 132 c ′, which still belongs to the technical schemes adopted by the invention without departing from the protected scope of the invention.
- each of the color filter patterns of the invention is corresponding to at least two pixel units and the display mediums are corresponding to each of the color filter patterns are controlled by at least two drive devices, so that by turning on and turning off the drive devices, the color of a single color filter pattern presents with grayscale.
- the invention can reduce the color bias problem at boundaries between two adjacent color filter patterns due to different angles of viewing (AOVs).
- the design of the electrophoretic display apparatus in the invention can improve the display quality varied with changing the AOV.
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Abstract
Description
- This application claims the priority benefit of Taiwan application serial no. 102102699, filed on Jan. 24, 2013. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
- 1. Field of the Invention
- The invention generally relates to a display apparatus, and more particularly, to an electrophoretic display apparatus.
- 2. Description of Related Art
- The electronic paper (e-paper) and the e-book use electrophoretic display technique to achieve the purpose of displaying. Taking the monochrome e-book as an example, the display medium thereof is constituted mainly by black electrophoretic liquid and white charged particles doped in the black electrophoretic liquid, where the white charged particles can migrate by applying a voltage so that each pixel can respectively display black color, white color or grayscale.
- In the current technique, most of the electrophoretic displays achieve the purpose of displaying by using the reflection of an external light source, where each pixel can respectively display the required grayscale through driving the white charged particles in the electrophoretic liquid by applying a voltage. In addition, in order to expand the application of the electrophoretic display, a color filter film is employed and disposed on the electrophoretic display film. At the time, the presented color of the electrophoretic display apparatus is achieved mainly by using the ambient light, which penetrates the color filter film, and then, after reflecting the ambient light by the white charged particles in the electrophoretic liquid, the reflected light penetrates the color filter film again for displaying.
- In general, the color filter layer mainly consists of a plurality of filter patterns with different colors, and each of the filter patterns with different colors is respectively corresponding to a pixel unit on the drive array substrate. When a single pixel unit is driven, the human naked eyes would have a perception of color bias at the boundaries between two adjacent filter patterns due to different angle of viewings (AOVs). To overcome the above-mentioned problem in the prior art, a black matrix is disposed to partition each filter pattern from the others so as to reduce the color bias problem. However, the above-mentioned measure will cause a relatively smaller light transmittance rate by the black matrix.
- Accordingly, the invention is directed to an electrophoretic display apparatus able to improve the display quality varied with changing angle of viewing (AOV).
- An electrophoretic display apparatus of the invention includes a drive array substrate, a color filter layer and an electrophoretic display film. The drive array substrate has a plurality of pixel units, in which each of the pixel units includes a drive device. The color filter layer is disposed on the drive array substrate and has a plurality of color filter patterns, in which each of the color filter patterns is corresponding to at least two of the pixel units. The electrophoretic display film is disposed between the drive array substrate and the color filter layer and includes a plurality of display mediums, in which the display mediums corresponding to each of the color filter patterns are controlled by at least two of the drive devices.
- In an embodiment of the invention, the electrophoretic display film further includes a flexible substrate and a common electrode. The flexible substrate is disposed between the color filter layer and the display mediums, and the common electrode is disposed on the flexible substrate and located between the flexible substrate and the display mediums.
- In an embodiment of the invention, each of the display mediums includes an electrophoretic liquid, a plurality of black charged particles and a plurality of white charged particles, and the black charged particles and the white charged particles are distributed in the electrophoretic liquid.
- In an embodiment of the invention, each of the display mediums includes an electrophoretic liquid, a plurality of black charged particles, a plurality of white charged particles and a micro-cups structure, and the micro-cups structure is filled with the electrophoretic liquid, the black charged particles and the white charged particles therein.
- In an embodiment of the invention, the color filter patterns include at least one red filter pattern, at least one blue filter pattern and at least one green filter pattern.
- In an embodiment of the invention, the color filter patterns include at least one red filter pattern, at least one blue filter pattern, at least one green filter pattern and at least one white filter pattern.
- In an embodiment of the invention, the area of each of the color filter patterns is between 50 micrometers and 10000 micrometers.
- In an embodiment of the invention, the drive devices of the pixel units corresponding to each of the color filter patterns are arranged in array.
- In an embodiment of the invention, the drive device includes a thin film transistor (TFT).
- In an embodiment of the invention, the TFT includes top-gate TFT or bottom gate TFT.
- Based on the description above, since each of the color filter patterns of the invention is corresponding to at least two pixel units and the display mediums corresponding to each of the color filter patterns are controlled by at least two drive devices, so that by turning on and turning off the drive devices, the color of a single color filter pattern presents with grayscale. In this way, the invention can reduce the color bias problem at boundaries between two adjacent color filter patterns due to different angles of viewing (AOVs). In short, the design of the electrophoretic display apparatus in the invention can improve the display quality varied with changing the AOV.
- In order to make the features and advantages of the present invention more comprehensible, the present invention is further described in detail in the following with reference to the embodiments and the accompanying drawings.
- The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
-
FIG. 1A is a partial top-view diagram of an electrophoretic display apparatus according to an embodiment of the invention. -
FIG. 1B is a partial cross-sectional diagram of the electrophoretic display apparatus ofFIG. 1A . -
FIGS. 1C and 1D are partial top-view diagrams respectively showing the color filter layer of the electrophoretic display apparatus inFIG. 1A according to two embodiments of the invention. -
FIG. 2 is a partial top-view diagram of a plurality of pixel units corresponding to a single color filter pattern according to an embodiment of the invention. -
FIG. 3 is a partial cross-sectional diagram of an electrophoretic display apparatus according to another embodiment of the invention. -
FIG. 1A is a partial top-view diagram of an electrophoretic display apparatus according to an embodiment of the invention andFIG. 1B is a partial cross-sectional diagram of the electrophoretic display apparatus ofFIG. 1A . For convenience, some elements inFIG. 1A are omitted. Referring toFIGS. 1A and 1B , in the embodiment, anelectrophoretic display apparatus 100 a includes adrive array substrate 110, acolor filter layer 120 and anelectrophoretic display film 130 a. Thedrive array substrate 110 has a plurality ofpixel units 112, in which each of thepixel units 112 includes adrive device 114. Thecolor filter layer 120 is disposed on thedrive array substrate 110 and has a plurality ofcolor filter patterns 122. Each of thecolor filter patterns 122 is corresponding to at least twopixel units 112. Theelectrophoretic display film 130 a is disposed between thedrive array substrate 110 and thecolor filter layer 120 and includes a plurality ofdisplay mediums 132, in which thedisplay mediums 132 corresponding to each of thecolor filter patterns 122 are controlled by at least two of thedrive devices 114. - In more details, in the embodiment, the
drive array substrate 110 is, for example, a TFT array substrate and thedrive device 114 is a TFT and the TFT is, as shown byFIG. 1B , a bottom-gate TFT. In other unshown embodiments however, thedrive device 114 can be a top-gate TFT as well, which the invention is not limited to. Theelectrophoretic display film 130 a in the embodiment further includes aflexible substrate 134 and acommon electrode 136, in which theflexible substrate 134 is disposed between thecolor filter layer 120 and thedisplay mediums 132, while thecommon electrode 136 is disposed on theflexible substrate 134 and located between theflexible substrate 134 and thedisplay mediums 132. The material of theflexible substrate 134 is, for example, poly-ethylene tetrephthalate (PET). Each of thedisplay mediums 132 herein includes an electrophoretic liquid 132 a, a plurality of black chargedparticles 132 b and a plurality of white chargedparticles 132 c as shown byFIG. 1B . The black chargedparticles 132 b and the white chargedparticles 132 c are distributed in the electrophoretic liquid 132 a. - As shown by
FIG. 1C , each of thecolor filter patterns 122 of the embodiment is composed of at least onered filter pattern 122 a (two ones are shown inFIG. 1C ), at least oneblue filter pattern 122 b (one is shown inFIG. 1C ) and at least onegreen filter pattern 122 c (one is shown inFIG. 1C ). In other embodiments, referring toFIG. 1D , thecolor filter patterns 122′ can be composed of at least onered filter pattern 122 a′ (one is shown inFIG. 1D ), at least oneblue filter pattern 122 b′ (one is shown inFIG. 1D ), at least onegreen filter pattern 122 c′ (one is shown inFIG. 1D ) and at least onewhite filter pattern 122 d′ (one is shown inFIG. 1D ). All the above-mentioned designs belong to the technical schemes adopted by the invention without departing from the protected scope of the invention. The area of each of thecolor filter patterns 122 herein is between 50 micrometers and 10000 micrometers and thedrive devices 114 of thepixel units 112 corresponding to each of thecolor filter patterns 122 are arranged in an array. - Referring to
FIG. 1A , for example, when all thedrive devices 114 within the central areas C corresponding to a singlecolor filter pattern 122 are in turning on state and all thedrive devices 114 within the peripheral areas P corresponding to a singlecolor filter pattern 122 are in turning-off state, at the time, the color of the singlecolor filter pattern 122 presents with grayscale coming with a bright central portion and dark surrounding portions. In this way, the invention can overcome the color bias problem due to different AOVs at the boundaries between two adjacentcolor filter patterns 122. In other embodiments, referring toFIG. 2 , it can be all thedrive devices 114 within the first areas P1 corresponding to a singlecolor filter pattern 122 are in turning on state and all thedrive devices 114 within the second areas P2 corresponding to a singlecolor filter pattern 122 are in turning off state. At the time, the color of the singlecolor filter pattern 122 presents with grayscale coming with the bright first areas P1 and the dark second areas P2 (the second areas P2 are respectively adjacent to a side of another color filter pattern 122). In addition, in other unshown embodiments, any people of the art can refer to the description of the above-mentioned embodiment and according to the real requirement make all thedrive devices 114 corresponding to a singlecolor filter pattern 122 in turning on state or in turning off state by design so as to achieve the required effect. - Since every
color filter pattern 122 in the embodiment is corresponding to at least twopixel units 112 and thedisplay mediums 132 corresponding to each thecolor filter pattern 122 are controlled by at least twodrive devices 114, the color of a singlecolor filter pattern 122 can present with grayscale by turning on/off thedrive devices 114. Thus, the invention can reduce the color bias problem at boundaries between two adjacent color filter patterns due to different AOVs. In short, the design of theelectrophoretic display apparatus 100 a in the embodiment can improve the display quality varied with changing angle of viewing (AOV). - It should be noted that the invention does not limit the composition of the
display medium 132 of theelectrophoretic display film 130 a. All though each of the above-mentioneddisplay mediums 132 is composed of an electrophoretic liquid 132 a, black chargedparticles 132 b and white chargedparticles 132 c, but in other embodiments, referring toFIG. 3 , each display medium 132′ of theelectrophoretic display film 130 b in anelectrophoretic display apparatus 100 b can include an electrophoretic liquid 132 a′, a plurality of black chargedparticles 132 b′, a plurality of white chargedparticles 132 c′ and amicro-cups structure 132 d′, in which themicro-cups structure 132 d′ is filled with the electrophoretic liquid 132 a′, the black chargedparticles 132 b′ and the white chargedparticles 132 c′, which still belongs to the technical schemes adopted by the invention without departing from the protected scope of the invention. - In summary, since each of the color filter patterns of the invention is corresponding to at least two pixel units and the display mediums are corresponding to each of the color filter patterns are controlled by at least two drive devices, so that by turning on and turning off the drive devices, the color of a single color filter pattern presents with grayscale. In this way, the invention can reduce the color bias problem at boundaries between two adjacent color filter patterns due to different angles of viewing (AOVs). In short, the design of the electrophoretic display apparatus in the invention can improve the display quality varied with changing the AOV.
- It will be apparent to those skilled in the art that the descriptions above are several preferred embodiments of the invention only, which does not limit the implementing range of the invention. Various modifications and variations can be made to the structure of the invention without departing from the scope or spirit of the invention. The claim scope of the invention is defined by the claims hereinafter.
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Application Number | Priority Date | Filing Date | Title |
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TW102102699A TWI490614B (en) | 2013-01-24 | 2013-01-24 | Electrophoretic display apparatus |
TW102102699A | 2013-01-24 | ||
TW102102699 | 2013-01-24 |
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US8780437B1 US8780437B1 (en) | 2014-07-15 |
US20140204453A1 true US20140204453A1 (en) | 2014-07-24 |
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US14/060,579 Active US8780437B1 (en) | 2013-01-24 | 2013-10-22 | Electrophoretic display apparatus |
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TWI507804B (en) * | 2013-10-18 | 2015-11-11 | E Ink Holdings Inc | Electrophoretic display apparatus |
GB201514337D0 (en) * | 2015-08-12 | 2015-09-23 | Plextek Ltd | Object with adjustable appearance and method of adjusting the appearance of an object |
US10464476B1 (en) | 2016-06-29 | 2019-11-05 | Apple Inc. | Lighting systems of vehicle seats |
US10638618B1 (en) | 2016-07-12 | 2020-04-28 | Apple Inc. | Cosmetic integration of displays |
US10222529B1 (en) | 2016-09-20 | 2019-03-05 | Apple Inc. | Lighting systems |
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